Propylaea

The construction was part of Pericles' great rebuilding program for Athens in c. 437 BCE.

Though the work was suspended due to the Peloponnesian War, the important pieces of Mnesicles' vision were able to come through.

The only other known use of metal in Greek architecture for structural purposes is the Temple of Zeus at Agrigento.

The oldest known freestanding propylaeum is the one located at the palace area in Pasargadae, an Achaemenid capital.

[2] In the 18th century, the Athenian Propylaea inspired Carl Gotthard Langhans in construction of the Brandenburg Gate in Berlin.

A 19th-century drawing of what the Propylaea in Athens might have looked like when intact
Propylaea of Baalbeck